I had a stool culture done by Metametrix (USA), and the results for Ppredominant bacteria" show amounts of 6 "obligate anaerobes," including bacteroides and prevotella. There is no mention of Ruminococcus, so I imagine they don't test for it.

I had a stool culture done by Metametrix (USA), and the results for Ppredominant bacteria" show amounts of 6 "obligate anaerobes," including bacteroides and prevotella. There is no mention of Ruminococcus, so I imagine they don't test for it.

The Ruminococcus genus contains the species: Ruminococcus flavefaciens, Ruminococcus albus, Ruminococcus bromii. The Ruminococcus genus is itself part of the Clostridia class of bacteria - which are linked to the gut problems in autism.

(The most common species in each genus has been highlighted on bold).​

However, own gut bacteria, as analyzed by the Comprehensive Digestive Stool Analysis 2.0 from Genova Diagnostics, showed none of the above three genera of bacteria, so I have no idea which of the 3 groups I am in.

I guess Genova Diagnostics, and other stool diagnostic services, only provide details of what they consider are the important species.

I thought it was interesting that these same researchers that identified the 3 bacterial groups have a project that for $2,100, you can have your entire gastrointestinal bacterial microbiota genetically sequenced. I guess you can't get more detailed than that.

OBESITY: There was a similar study also that showed that normal weight people have more Bacteroidetes bacteria in their stomach and intestines, while obese people have more Firmicutes bacteria. Reference: here.

Staphylococcus and Staphylococcus are both Firmicutes.

Note that Bacteroidetes ? Bacteroides. The categories of Bacteroidetes and Firmicutes are phyla, which are much higher up on the taxonomical classification tree than Bacteroides, Prevotella and Ruminococcus, which are genera (genera = the plural of genus).